Brake mechanism



Sept. 18,1923. 11,468,453

E. H. BELDEN BRAKE MECHANISM Original Filed July 19, 1917 I N V EN TOR. I a ward I?! B e /a/ e n. BY 1 A TTORNE Y.

Patented $ept. is, 1923.

the r EDWARD H. IBELDEN, 0F TOLEDO, OHIO, ASSIGNOE,BY IVIESNE ASSIGHEVIENTS, TO THE VILLYS-OVEBLAND COMPANY, OF TOLEDQ, OZ-T10, A. COBPORATLCON- OF OHIO.

BRAKE MECHANISM.

Original application filed July 19, 1917, Serial No. 181,558. Divided and this application filed March 14, 1919. Serial No. 282,619.

To all whom-it may concern:

Be it known that I, EDwAnoI-l. BELDEN, a citizen of the United States, residing at Toledo, county of Lucas, and State of Ohio, have invented certain new and useful Improvements in Brake Mechanism,'of which I declare the following to be a full, clear, and exact description.

This invention relates to brake mechanism, such as is particularly adapted to be employed in connection with the transmission shaft of a motor vehicle. This application is a division of my co-pending application, Ser. No. 181,556, filed July 19, 1917;

One object of the invention is to provide an improved form of brake mechanism, which is of simple construction and efficient in operation. V r i A further object of the inventionis to provide an improved form of brake mechanism adapted to be readily applied to the trans mission shaft of a motor vehicle.

Further objects of this invention relate to economies of manufacture and details of construction, as will hereinafter appear from the detailed description to iollow.

The objects of the invention are accomplished in oneinstance by the devices and means described in the followingspeoifica tion, but it is evident that the same may be varied widely without departing from the scope of the invention as pointed out in the appended claims; i

A structure constituting one embodiment of the invention, which may be the preferred, is illustrated in the accompanying drawings forming a part herein, in which:

' Fig. I is a sectional view of the transmission brake, illustrating the relative positions of the operating parts with respect to the transmission shaft.

Fig. 11 is a view in side elevation showing the means for operating the transmission brake.

Fig. 111 is a horizontal section view, taken along the line HD9111 of Figs. l and II, and showing in further detail the means for operating the transmission brake.

Similar reference characters refer to corresponding parts 7 throughout the several views, and the sectional views are taken looking in the direction of the small arrows at the ends of the section line.

In the embodiment of the invention illusautomobile.

trated herewith, 1 represents the usual transmission shaft, to which is secured a brake hub 2 provided with an annular peripheral flange 3 extending laterally from the plane of the brake dram. The brake drum :2 together with a laterally extending peripheral flange 3 is enclosed by the transmission brake casing i, which may form a part of the main transmission casing oi? the A brake band 5 is adapted to surround the brake drum and bear against the exterior surface of the peripheral flange 3 formed thereon in such a manner that when tension is exerted upon the opposite ends of the brake band to draw the same together, frictional resistance will be encountered between the brake band and the peripheral flange carried by the brake drum in such a manner as to retard the rotative movement of the shaft. A bracket (3 is secured to each of the opposite ends of the brake band, and each of the said brackets is provided with upwardly extending li'orl-zed ears 7, between the forked ears or" each bracket is disposed the stem 8 of a plunger 9 which is slidably mounted in a boss 10 formed in the transmission brake casing. A coiled spring 11 surrounds the stem 8 and is positioned between the forked ears or" the opposite brackets in such a manner as to bear against the interior surface thereof and normally maintain the brackets separated "from each other, whereby the band brake is held in such position that the brake drum is freely rotatable within the same. A nut 12 is threaded upon the free end of the stem 8 in such a manner as to be capable of adjustment thereon for the purpose of properly adiusting the brake band with respect to the exterior surface of the peripheral flange.

The boss 10 is formed in such a manner as to provide an abutment 13 against which the outer surfaces of the forked enos "I of one of the brackets (Sis adapted to it slot 1% is formed in the plunger 9 outside of the block 10, the said slot having an in- 'clined. or beveled edge 15, which is adapted carries at'its upper end the pedal 22, having a stem 23, which is adjustably secured in the forked end 2% of the lever 20. said stem being adapted to extend through the dashboard so as to carry the pedal 22 above the dash in the usual manner. An opening 25 is provided in the top of the transmission brake casing, through which the nut 12 may be adjusted to vary the tension upon the brake band.

The operation of the brake mechanism described above will be clearly understood from the preceding description. The brake band 5 is drawn into close contact with the peripheral flange 3 carried by the brake drum. when the lever 20 is operated by the depression of the pedal 22, since the depression of the pedal 22 causes the rod 18 to be drawn forwardly, thus forcing the beveled edge 15 of the plunger and causing the plunger to be displaced toward the left, as seen in Fig. I. thereby drawing the brackets 6 closer together and bringing the brake band into closer engagement. with the outer surface of the peripheral flange. When the pedal 22 is released, the spring ll'separates the brackets 6 and releases the brake band from engagement with the peripheral surface of the brake drum.

While I have shown and described in considerable detail a specific embodiment of my invention, it is to be understood that this showing and description is illustrative only and for the purpose of rendering my invention more clear, and that I do not regard the invention as limited to the details of construction illustrated or described, nor any of them, except insofar as I have included such limitation within theterms of the following claims, in which it is my intention to claim all novelty inherent in my invention broadly as well as specifically.

' What I claim as new and desire to secure by Letters Patent is 1. In a device of the class described, the combination of a shaft, a brake drum secured thereto, a brake band surrounding said drum and having brackets secured to its ends provided with late ally extending ears. a slidably mounted plunger having a stem disposed in said forked ears, a fixed abutment engaged by one of said ears. and a nut threaded on the end of said stem and engaging the other ear, a spring onsaid stem compressed between said ears, said plunger havinga transverse wedge-shaped slot, a wedge slidably mounted in said slot and means for shifting said wedge.

52. In a device of the class described, the combination of a shaft, a brake drum secured thereto, a brake band surrounding said drumand having brackets secured to its ends provided with laterally extending ears, a

slidably mounted plunger having a stem connected with one of said ears, and means for moving said plunger laterally comprising a wedge slidably mounted in a slot in the plunger.

In a device of the class described a housing, a drum within said housing, a'bearing upon the housing, a plunger extending through said bearing, a brake band substantially surrounding said drum with its ends carried by said plunger, said bearing forming an abutment for one end of said band to limit its movement, the other end of said band being movable relatively thereto,'yield able means interposed between the ends of said band and serving to hold the non-movable end thereof in contact with said abut.- ment, and a wedge operatively connected with said plunger for actuating the same. i

4:. In a device of the class described the combination of a casing, a brake drum enclosed thereby. a brake band surrounding said drum and having one endengaging said casing. an operating rod slidingly-mounted in said'casing, adjustable means on said rod for engaging the other end of said. brake hand, said operating rod and said casing having opposed faces and a wedge shaped member movable transversely to said rod and engaging said opposed faces.

In a device of the class described the (-on'ibination of a casing, a brake drum therein. a brake band encircling said drum, a portion of said casing forming an abutment for one end of said brake band and providing a guideway for a reciprocable member adjustablyv connected to the other end of said brake band, resilient means for separating the ends of said brake band, said casing and said reciprocable member having opposed faces and a pull rod having a wedge shaped end portion for engaging said opposed faces.

6. In a device of the class describedthe combination of a frame, a brake drum, a brake band thereon, one end Of which engages said frame as an abutment, a member reciprocably mounted in said frame and connected to the opposite end of said brake band and means comprising. a pull rod having a wedge shaped portion engaging opposed faces on said frame and member for operating said member.

7. In a device of the class described the combination of a frame, a brake drum, a brake band thereon one end of which engages said frame, a member reciprocably mounted in said frame and connected to the opposite end of said brake band, said member having an opening therethrough and a pull rod for actuating said brake having a wedge shaped extremity extending through said opening and engaging opposed faces on said frameand said member.

In testimony whereof. I atfix my signature.

, BID-WARD H. BELDEN. 

